code: def absval(constraints, **kwds):
      """rewrite a system of symbolic constraints without using absolute value.
  
      Returns a system of equations where 'abs' has been replaced with the
      equivalent conditional algebraic expressions.
  
      Args:
          constraints (str): a string of symbolic constraints, with one constraint
              equation per line. Standard python syntax should be followed (the
              ``math`` and ``numpy`` modules are already imported).
          all (bool, default=False): return all simplifications due to absolute values
              If all is True, return all possible simplifications due to absolute
              value being used in one or more of the equations. If False, return
              only one possible simplification.
          verbose (bool, default=False): if True, print debug information.
      """
      import random
      import itertools as it
  
      all = kwds["all"] if "all" in kwds else False
      verbose = kwds["verbose"] if "verbose" in kwds else False
      abs_ = "abs("
      eqns = [
          (
              [
                  "".join((i, j))
                  for i, j in zip(*_absval(e.strip(), **kwds))
              ]
              if abs_ in e
              else [e.strip()]
          )
          for e in constraints.strip().split(NL)
      ]
      # combine each eqn, and simplify the conditionals
      eqns = tuple(
          NL.join(merge(*(NL.join(i).split(NL)), inclusive=True))
          for i in it.product(*eqns)
      )  # FIXME: inclusive=True, or False ???
      return (
          (eqns if all else eqns[random.randint(0, len(eqns) - 1)])
          if len(eqns) > 1
          else (eqns[0] if len(eqns) else "")
      )
  
imports: from numpy import ndarray, asarray, any
  from mystic._symbolic import solve
  from mystic.tools import list_or_tuple_or_ndarray, flatten
label_desc: Use image node_id 16 for calling a global function with example usage: absval(constraints) and returns: unknown